Shield for air-tubes in fire-boxes for steam-boilers



Patanted July 26 I898.

G. W. STEVENS.

SHIELD FOR AIR TUBES IN FIRE BOXES FOR STEAM BOILERS.

(Application filed Jan. 29, 1898.)

- (No Model.)

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GEORGE W. STEVENS, OF ELY RIA, OHIO.

SHIELD FOR AIR-TUBES IN FIRE-BOXES FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 607,896, dated July 26, 1898.

Application filed January 29, 1898. Serial No. 668,381. (No model.)

To all whom it may concern:

Be it known that I, GEORGE W. STEVENS,

a citizen of the United States, residing at Ely ria, in the county of Lorain and State of Ohio, have invented a new and useful Shield or Cover for Air-Tubes in Fire-Boxes to Steam- Boilers, of which the following is a specification.

My invention relates to improvements in shields or covers to air-tubes in fire-boxes to steam-boilers, and more especially to shields or covers to air-tubes used in fire-boxes of locomotive-engines; and the objects of my improvement are to provide a tube with a shield over its outer end sufliciently removed not to interfere with the passage or free admission of air through said tube, but of such size and shape as to prevent any direct rays of light escaping through said air-tube in such a manner as to interfere with the giving of signals by trainmen in proximity to a locomotive-engine the fire-box of which is provided with air-tubes, also to prevent the light escaping in any other Way, so as to interfere in any manner with the comfort, convenience,

and safety of passengers, trainmen, and

others. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figures 1 and 2 are respectively a vertical section and front view of my invention applied to a boiler with a jacket. Figs. 3 and 4 show respectivelya sectional end View and side view of section of fire-box with my invention applied.

Similar letters refer to similar parts throughout the several views.

A represents an air-tube of ordinary construction connecting the outer fire-box sheet B of a boiler with the inner fire-box sheet E of a boiler.

F represents a thimble interposed or inserted between the jacket G and fire-box sheet B, as shown in Figs. 1 and 3. To opposite sides of this thimble F are attached or formed as a part of it longitudinal projecting arms D of any desired length, connecting with or secured 'at their outer ends to a shield or cover 0, said coverC being of a size equal to or greater than the inside diameter of the tube A. In cases where so desired the inner or lower ends of said arms D may be turned outwardly, whereby lugs may be formed and same secured by means of bolts or otherwise to "said jacket G. In case where no jacket is used said lugs may be secured to the outer fire-box sheet B, or, if desired, the inner ends of the arms D may be attached to a ring,

which may be fitted inside and secured to the tube A and to the outer ends of the arms D, attached or secured to the shield or cover 0, as heretofore described.

It is obvious that other and further modifications of my invention may be devised in its details without interfering with the general construction of my invention; but

lVhat I claim as my invention, and desire to securebroadly by Letters Patent of the United States, is-

1. The'combination of the air-tubes used in fire-boxes of steam-boilers with a shield or cover over the outer ends, supported by one or more arms attached to said fire-box or boiler, and holding said shield or cover any desired distance from the outer end of the air-tubes whereby the free admission of air will not be restricted and the direct rays of light emitted through said tubes intercepted, all as above set forth and substantially as described.

2. The combination of air-tubes in a firebox to a steam-boiler with a shield or cover supported by one or more arms, any suitable distance from the outer ends of said air-tubes whereby the free admission of air into and through said air-tubes will not be restricted and the direct rays of light emitted through said air-tubes from the fire-box be intercepted, all as above set forth and substantially as described.

3. The combination of a shield or cover over the outer ends of the air-tubes of a firebox to a steam-boiler with said air-tubes, said shield or cover of sufficient size and supported at any suitable distance from the outer ends of said air-tubes whereby the free admission of air will not be restricted, and the direct rays of light from the fire-box emitted through said air-tubes be intercepted, all as above set forth and substantially as described.

' GEORGE V. STEVENS.

\Vitnesses:

W. L. FAY, FRANK M. STEVENS. 

